我已经改进了方法，把下面的代码放在一些UI实用工具类(最好，不一定)，这样它可以从所有的活动或片段类访问，以达到它的目的。

public static void serachAndHideSoftKeybordFromView(View view, final Activity act) {
    if(!(view instanceof EditText)) {
        view.setOnTouchListener(new View.OnTouchListener() {
            public boolean onTouch(View v, MotionEvent event) {
                hideSoftKeyboard(act);
                return false;
            }
        });
    }
    if (view instanceof ViewGroup) {
        for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
            View nextViewInHierarchy = ((ViewGroup) view).getChildAt(i);
            serachAndHideSoftKeybordFromView(nextViewInHierarchy, act);
        }
    }
}
public static void hideSoftKeyboard (Activity activity) {
    InputMethodManager inputMethodManager = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
    inputMethodManager.hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(), 0);
}

然后假设你需要从activity中调用它，像这样调用;

UIutils.serachAndHideSoftKeybordFromView(findViewById(android.R.id.content), YourActivityName.this);

请注意

findViewById (android.R.id.content)

这给了我们当前组的根视图(你不能在根视图上设置id)。

欢呼:)

尝试把stateHidden作为你的活动windowSoftInputMode值

http://developer.android.com/reference/android/R.attr.html#windowSoftInputMode

例如你的活动:

this.getWindow().setSoftInputMode(
    WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);

加上之前的@sumit sonawane的答案，这个解决方案不会在用户滚动时隐藏键盘。

public long pressTime = 0;
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    if (ev.getAction() == MotionEvent.ACTION_DOWN) {
        pressTime = System.currentTimeMillis();
    }
    else if (ev.getAction() == MotionEvent.ACTION_UP) {
        long releaseTime = System.currentTimeMillis();
        if (releaseTime-pressTime < 200) {
            if (getCurrentFocus() != null) {
                GhostTube.print("BottomNavActivity", "Touch event with keyboard detected...");
                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
            }
        }
    }
    return super.dispatchTouchEvent(ev);
}

添加代码到您的活动，也将照顾片段。

另一个想法是覆盖onInterceptTouchEvent方法在根视图为您的活动。

触摸事件从屏幕上最前面的视图(触摸事件发生的地方)沿着调用onTouch方法的视图堆栈向下移动，直到任何视图返回true，表明触摸事件被消费。由于许多视图默认使用触摸事件(例如，EditText或TextView的情况)，事件不会到达活动的根视图onTouch方法。

But, before do this traversal, the touch event travels another path, going from the root view down the view tree until it gets to the front most view. This traversal is done by calling onInterceptTouchEvent. If the method returns true, it intercepts the event... nahhh, but that is a little bit trick, I don't think you want to do that nor to know the details. What you need to know is that you can override this method on the root view for your Activity, and put there the code to hide the keyboard when necessary.

@Override
    public boolean onTouchEvent(MotionEvent event) {
        InputMethodManager imm = (InputMethodManager)getSystemService(Context.
                INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
        return true;
    }

在任何活动(或扩展类活动)中覆盖公共布尔dispatchTouchEvent(MotionEvent事件)

@Override
public boolean dispatchTouchEvent(MotionEvent event) {
    View view = getCurrentFocus();
    boolean ret = super.dispatchTouchEvent(event);

    if (view instanceof EditText) {
        View w = getCurrentFocus();
        int scrcoords[] = new int[2];
        w.getLocationOnScreen(scrcoords);
        float x = event.getRawX() + w.getLeft() - scrcoords[0];
        float y = event.getRawY() + w.getTop() - scrcoords[1];
        
        if (event.getAction() == MotionEvent.ACTION_UP 
 && (x < w.getLeft() || x >= w.getRight() 
 || y < w.getTop() || y > w.getBottom()) ) { 
            InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(getWindow().getCurrentFocus().getWindowToken(), 0);
        }
    }
 return ret;
}

芬兰湾的科特林版:

 override fun dispatchTouchEvent(ev: MotionEvent?): Boolean {
        val ret = super.dispatchTouchEvent(ev)
        ev?.let { event ->
            if (event.action == MotionEvent.ACTION_UP) {
                currentFocus?.let { view ->
                    if (view is EditText) {
                        val touchCoordinates = IntArray(2)
                        view.getLocationOnScreen(touchCoordinates)
                        val x: Float = event.rawX + view.getLeft() - touchCoordinates[0]
                        val y: Float = event.rawY + view.getTop() - touchCoordinates[1]
                        //If the touch position is outside the EditText then we hide the keyboard
                        if (x < view.getLeft() || x >= view.getRight() || y < view.getTop() || y > view.getBottom()) {
                            val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
                            imm.hideSoftInputFromWindow(view.windowToken, 0)
                            view.clearFocus()
                        }
                    }
                }
            }
        }
        return ret
    }

这就是你需要做的